Merged requested to merge gerddie/virglrenderer:emulate-tex2DRect-on-gles into master
This series fixes
texelFetch for emulated 1D textures, and adds emulation for
A number of piglits are fixed by this: textureGather with 2DRECT texture arb_fragment_program_shadow/tex-shadow2drect arb_fragment_program_shadow/txp-shadow2drect glsl-fs-texture2drect -proj3 and -proj4
For some one still has to force GL 3.3 in the guest because of the required GLSL version.